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Leim Patent No. 90,224, dated May 1s, 1869.

IMPROVEMENT IN DETACHABLE CA'LKS FOR HQRSESHOES.

The Schedule referred'to in these Letters Patent and making part of thesame.

To whom lit 'ma/y concern:

Beit known that I, WILLIAM JONES Bamm, of Gincinnati, Hamilton county,Ohio, have invented a new and useful Detachable Calk for Horseshoes; andI hereby declare the following to be a full, clear, and exactdescr'iption thereof, reference being had to the accompanying drawings,making apart of this specification.

This invention relates to a compact and strong, yet light calk for readyattachment to, or removalrfrom a horseshoe, while the'latter is on thehoof of the animal.

Figure 1 represents the parts of my calk detached, viewed from above.

` Figure 2 is a longitudinal section through the parts in position.

Figure 3 represents a modification of my improvement, viewed from below.

A, figs. 1 and 2, represents an ordinary horseshoe without toe.

B and O aretwo jaws, of malleable iron, adapted to 'trate the hoof; adovetailed shank, E, which enters a correspondingly undercut gain orgroove, F, in the jaw C; va nut, G, for the reception of a screw, H,which screw, passing through the jaw O, serves to draw and hold the twojaws together, and to cause them to tightly grasp the horseshoe.

The jaw B has also an' undercut groove, I, on its under side, to receiveand hold a steel bit, J, which constitutes thehtoe proper.

In addition to the parts named, the jaw C has a lip, K, which,overlapping theinner edge of the shoe, serves, in conj unctiou with thespurred ange D D' and the screw H, to hold the calk firmly to the shoe,and to prevent it dropping oii` of the latter when in use.

An excavation, c, iu the jaw C, permits the uut G to enter said jaw asthe parts are screwed home.

In orderto protect the hoof, and to cause auniform bearing against it ofthejaw B, and to prevent rattling, a cushion, L, of India rubber o1lleather, may be interposcted between the flange D D' and the front ofthe hoo Fig. 3 represents a modification of my invention, adapting itfor use in shoes having a customary fixed toe-calk.

In this form of my invention the ange D D bifurcates downward as well asupward, so as to avoid the xed toe-calk, and each branch has a separatedovetailed groove and bit, as shown in said figure.

I am aware that a somewhat similar device has been patented by EdwardSneider, under date of October 2 1866.

One difference existing between Snieders inventi n, and my own is theexactly opposite manner in wh h the two work.

While his is fastened to the -shoe by the pressure of one end of thescrew-bolt against the rear edge of the shoe, my improvement is securedby the direct action of the same upon the detachable calk itself, thelatter being drawn back by the screw, so as to take rm hold of the hoof,as heretofore described.

My invention is also an improvement upon Sneiders inasmuch as in minethe supplemental shoe described by him is dispensed with, as are alsothe split-spring washer and the studs on the rear extremity of thesupplemental shoe deseribedin his patent, and rendered necessary, theformer by the manner in whichth bolt acts upon the shoe, the latter toprevent latera displacement.

In my improved detachable calk these cumbersome attachments are allrendered unnecessary by the pe`- culiar construction of the parts B andC.

I also construct my improvement so that it may be applied to the commonshoe, having the ordinary toecalks in front.

.My improvement 1s also supplied with a movable toe-piece proper J,which may be inserted or taken out at pleasure, by means of itswedge-form and the dovetailed groove I.

I do not claim the broad principle of attaching movable ealks tohorseshoes; but

' What I do claim as new, and of my own invention, and for which Idesire to secure Letters Patent, is-

1. The detachable calk, composed of the jaw B, spurred auge D D',dovetailed shank'E, nut G, nndercut groove I, steel bit J, jaw O c, gainF, lip K, and screw H, constructed and combined to operateslibstantially as and' for the purposes set forth.

2. In combination with the detachable calk, the pad L, for the purposesspecified.

In testimony of which invention, I hereunto set my Witnesses:

Gao. H. KNIGHT, JAMES H. LAYMAN.

